It could mean a literal Splash of Jizz, in a droplet. or a metaphorical jizz splash

A friend or colleague whose foolish mistake has ruined yours or someone else's plans... The metaphor represents both the accidental nature of the mistake or splash, and the sticky mess of events which the mistake causes.

a friend or colleugegegege tells evryone that hes related to a sleeping badger in the middle of the night and the profound nature i which he says this leaves evryone Soooo Shocked that they all whip out their cocks and jizz splash him or her.